Chapter 5 Quiz B Flashcards
The backup timer should cut off at _________ or _____________, whichever comes first.
6 seconds
600 mAs
X-ray system reciprocity has an acceptance parameter of:
a.) 20%
b.) 15%
c.) 5%
d.) 10%
d.) 10%
What will likely happen if “blooming” has occured?
a.) image detail will be degraded
b.) contrast and density will be altered
c.) pitting of the anode will result
d.) the anode will fail to rotate
a.) image detail will be degraded
Radiographic kVp should be evaluated:
a.) annually
b.) monthly
c.) semiannually
d.) weekly
a.) annually
If the actual SID doesn’t match the SID set by the technologist, what two things can occur?
a.) image distortion
b.) excessive density
c.) increased patient dose
d.) excessive contrast
a.) image distortion
c.) Increased patient dose
The xray beam and bucky tray must be aligned within ________% of the SID.
a.) 5
b.) 1
c.) 10
d.) 2
b.) 1
Beam quantity measures:
a.) mAs
b.) kVp
c.) AEC
d.) timer accuracy
a.) mAs
Collimation systems equipped with positive beam limitation must be accurate within ________ % of the SID.
a.) 5
b.) 2
c.) 4
d.) 3
d.) 3
A high frequency generator can use current that been altered to as much as ___________ Hz before being rectified.
a.) 100,000
b.) 120
c.) 60
d.) 60,000
a.) 100,000
A 3 phase-12 pulse generator will produce how many pulses in one second?
a.) 360
b.) 1/1000
c.) 720
d.) 1/120
c.) 720
A quality control program for radiographic equipment should include which of the following:
1.) visual inspection
2.) enviromental inspection
3.) performance testing
a.) 1, 2 and 3
b.) 1 and 2 only
c.) 1 and 3 only
d.) 2 and 3 only
a.) 1, 2 and 3
The minimum filtration required for general purspose radiography and fluoroscopy is:
a.) 2.5 mm
b.) 2.0mm
c.) 2.3 mm
d.) 3.5 mm
a.) 2.5mm
Which of the following can be used to measure effective focal spot size?
a.) pinhole camera
b.) ion chamber
c.) densitometer
d.) solid state detector
a. ) pinhole camera
The variability for timer accuracy for exposure times greater than 10 ms is _________%
a.) 2
b.) 20
c.) 5
d.) 10
c.) 5
If there is inaccurancy of the timer, what could result?
a.) excessive contrast
b.) increased patient dose
c.) insufficient density
d.) image distortion
b.) increased patient dose
If mas is increased in increments then the radiation output should increase in the same sequential change. This is called:
a.) linearity
b.) accuracy
c.) reproducibility
d.) reciprocity
a.) linearity
If the kvp stated on the console matches the actual x ray energy this is called:
a.) accuracy
b.) reproducibility
c.) reciprocty
d.) linearity
a.) accuracy
A pinhole camera and a star pattern are test tools for:
a.) kvp
b.) focal spot size
c.) mas
d.) exposure timer
b.) focal spot size
Central ray congruency is also known as:
a.) linearity
b.) detent alignment
c.) light field radiation field congruence
d.) beam/bucky alignment
d.) beam/bucky alignment
Output radiation intensity should be reproducible to within:
a.) 5%
b.) 1 %
c.) 10%
d.) 5%
c.) 10%
In regards to an AEC system, the ___________ receives the current signal sent by the sensor and terminates the exposure.
a.) element
b.) backup timer
c.) comparator
d.) detector
c.) comparator
Focal spot size affects which part of the image?
a.) contrast
b.) scatter
c.) spatial resolution
d.) density
c.) spatial resolution
The wall of the control booth must be at least _________ ft high.
7
Which type of generator uses multiple sources of alternating current so that the voltage never drops to zero?
a.) high frequency
b.) single phase
c.) three phase
d.) failing load
c.) three phase
Two common quality control tests that should be performed on grids are grid ________ and grid __________ tests.
a.)ratio, alignment
b.) ratio, frequency
c.) alignment, uniformity
d.) uniformity, ratio
c.) alignment, uniformity
